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plz explain this....

tushar uniyal
in Engineering

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Hey...just a few moments back I heard(*lolz...not for the first time)the sound produced by the fan when its rotating..so anybody who could explain me the reason of the vibration sort of sound....? Thx in advance

I wrote the query in a wrong manner....dont reply and sry:(

The frequency of the sounds you hear are a multiple of the number of blades of the fan.

Sound is, of course, generated by moving air, which is what a fan does.

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